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   RE: Is this Impossible !!

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  • From: Mark Birbeck <Mark.Birbeck@iedigital.net>
  • To: xml dev mailing list <xml-dev@ic.ac.uk>
  • Date: Thu, 21 Oct 1999 15:58:41 +0100

Hi everyone,
Very busy so can't give you in depth on this, but I note that you are using VB scripting so here is a bit of code from a VB script version of our SOAP server.
It's not that complicated, but it provides you with an easy way to create a results set from any values. For example, it could build a node list from a three element array, with the first element being another array that contains record sets, the second being an integer, and the third being an XML DOM node (should you want to).
Note that it copes with nested recordsets - which is great if you are using the Microsoft data shaping facility in ADO. In fact using this routine and data shaping is probably the easiest way to get an XML document with real structure out of a relational database.
Two quick things that are slightly off theme:
First - if you are returning XML you should really consider querying in XML. The client should not really be sending SQL queries since you are not returning a SQL result set. You should accept an XML query (say, using XPath) and then convert that on the server to an SQL query. That way the fact that your data is currently relational will be hidden (since it may change).
Second - for those interested - note how much better SOAP structure is than XML-RPC! I've fallen for it!!
Best regards,
Mark Birbeck
x-port.net Ltd.
-----Original Message-----
From: Goyal, Sanjeev [mailto:Sanjeev.Goyal@usa.xerox.com]
Sent: Thursday, October 21, 1999 2:49 PM
To: 'Abhishek Srivastava'
Cc: xml dev mailing list
Subject: RE: Is this Impossible !!

Most of the XML Parser implementations provides mechanism to generate well formed XML documents from the DOM Tree. I have used sun's XML parser, it provides APIs to generate well-formed XML from your Document Node.
Hope it helps.
 -----Original Message-----
From: Abhishek Srivastava [mailto:abisheks@india.hp.com]
Sent: Wednesday, October 20, 1999 1:29 AM
To: xml dev mailing list
Subject: Is this Immpossible !!

Hi All,
I have the following requirement. A client wants to query a database. It sends out an SQL Query to the Database server. At the server side, instead of returning a recordset, it returns an XML File.
The client on receiving the XML file, parsers it for "Validity" (to be sure that all elements it had asked for are there).
Problem is that at the server side, How to build the xml document.
Presently, I am doing something like this
String("<Name>") + rs.getField("auName") + String("</Name>")
However, this is a very inelegant approach as the code is full of such string concatenations.
Is there a more elegant solution to this ?  All the material on XML talks about parsing and reading XML. What about writing them ? Are there DOM / SAX Api extensions available that would
create "VALID" XML documents without clutter in the code ?
Any help would be greatly appreciated.
Thanks & Best Regards,
    _/               Abhishek Srivastava
   _/                Hewlett Packard ISO      
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